>From Steve Spector, Kellogg Center, Derby, 6/14/16, observed a Brewster's Warbler on the Kestrel Trail (about 210 paces from the beginning of the trail), from 12:15 PM until about 3:30 PM. Seemed paired with a Blue-winged Warbler and engaged in feeding what appears to be an unfledged Cowbird about 35 feet a tree. It's possible they have a nest, but I couldn't find it. A few times adults flew away from tree with what could have been fecal sacs. Brewster's has a striking golden crown, dark eyeline, white underparts, gray wings with 2 pale wing bars (fits Sibley's description of a backcross adult male). Neither Brewster's nor Blue-winged sang, but Brewster's often makes a faint "tip" note. Could not get a photograph. charsjs at sbcglobal.net